The Iowa plain dealer. [volume] (New Oregon, Howard County, Iowa) 1867-1895, 1887-11-03
SCIENCE AND INDUSTRY.

1t is said that the Belgian glass.
workers are now preparing to make
glass into various shapes and patterns
by running sheets Of it at just the right
temperature to work nicely through
steel rollers.
The question as to what is the exact
mechanical equivalent Of heat has long
puzzled engineers. The latest expert
mcnts show that one pound Of water
raised one degree Fahrenheit, is equal
to one pound lifted 769 feet. rhildlcl-
phjG Record.
The Pittsburgh Iron World says
that Pittsburgh steel-makers have es-
tablished agencies for the sale Of the
finer grades Of steel suitable for making
cutlery in Europe, India and Australia.
Their sales have been so considerable
as to practically guarantee an cstab-
lished trade. Steel has been sold in
competition with an English-nade arti-
Gle At the samo price.
An investigation as to the height
Of summer clouds, made in Sweden.
under the auspices Of the Royal Scien-
tiic Society Of Upsala, shows that
clouds occur most frequently ut heights
Of twenty-three hundred and fifty-fve
hundred feet. In the summers of 1884
and 1885. the loftiest cloud observed at
Upsala was forty-one thousand feet
above the earth's surface. or nearly
eight milcs.-N Y Ledger.
During five school years the director
Of the Royal Deaf-Mutc Institution at
Copenhagen has made semi-diurnal
measurements Of the height and weight
of the children under his care, and he
deduced number Of condolences be-
tween variations in their weight and
those in the temperature Of the air
Ark0nsaaO 1rGUeler.
The copper mining business has
fallen to very low ebb in Russia. It
is reported that out Of 1853 copper
mines in the Ural Mountains only
twenty-eight are being worked. The de-
cline of the industry is attributed to the
destruction Of the surrounding forests
and the consequent scarcity of fuel,
acting in conjunction with great diff
cultics Of transport.
The bottle industry is a very large
one, the number produced per day in
the respective countries being estimated
as follows: Great Britain and Ireland,
9.206; Sweden. 900; Norway, 600; Den
mark, $50; Germany and Belgium, 3O.-
039; Austria, 1000; France, 100; United
States, $40; Canada, 100; Australia,
2O7; total, 46, 4S2 gross. With 800 work.
ing days this gives no fewer than 15..
92s. 600 gross per year.
"A new building material called
stone brick, harder than the hardes,
.clay-brick. is made from simple mortar.
but scientifically made and perfec,
mortar; in fact, hydraulic cement,
and the grinding together of lime and
sand in q dry state-including also
some alum:na, which is usually presen,
in sand-and the subsequent heating By
steam, give the mixture the properties
| of the burned hydraulic ccments .,
present in use.-Pub!ic Opinion.
During August there wero 1900
freight cars required to carry Californis
shipments to the East. The amour,
carried. in pounds, was 40, 0O0, 900. and
OF that enormous quantity over one
half. 2O.5oO.000 pounds, consisted 0,
green. dried and canned fruit. Ths
railroads carried 10000. 900 pounds o,
sugar and 5000. 900 pounds Of tea. The
last article was imported. of course
and transhipped, as was also part o1
the remainder of the 40. 0O0. 600 pounds.
| San Francisco Examiner.